US1325223A - Valve mechanism. - Google Patents

Description

:3, wiimiismi. waive msc'miiism; 'APPLICATAOM 'mau Nov. 2s. 19!?- Inventor James Wilkinson His Attorney,

bolying m v invention; Fig.

view .on a larger scale of a portion of the valve actuating parts,

ating parts'in a position "'entn i-shaped passage p thefflnidflows in 'passlng from the inlet 6 JAMES WILKINSON,

I vairvn MECHANISM.

.To-a'll whom it may, concern: 1 i

S pecification'ot Letters Patent. Patented Beit known that I, JA'arnsiWimiinsom a citizen. -.of the the county of Schenectady,

specification.

' The present United States, residing at invention relates to valve.

mechanisms and has for it's-object'to provide an improved valve mechanism embodying a number or new great utility.

For a considerationof what-1 believe to be novel and my invention, attention is directed .to j the accompanying .specifi'cation. and the claims appended-thereto.

- In thepresent features and combinations of instance I have shown r'ny' improvements as embodied 111' a valve media-- is connected by passage nism of "the "so-called combined trip and throttle type, particularly turbine. Q-Xswill' appear; hereinafter, some features of my 111\811t10n. are directed par 'ticularlyto valve mechanisms-for this general purpose, while other more general application. 1

In the drawing, Figure I is an elevation partlv in section of: a valvefstructure emfeatnres are of stem structure and v andFig. 3' 1s'a'v1ew'show1ng the valvea'ctu shownin Fig. 1. I p,

Referring to thepdrawing, 5 indicates a casing having an inlet 6 and an outlet 7-. I1i- -th e casing is a wall 8 which defines an opening 9 in which is located a cylinder 10 2 is a' sectional" intended for'use, in controllingthe flow of elastic fluid to ,whenthe pilot.

tending cylinders 18 andltl." In cylinder 18 is a pllo't valve seat 2O,and ,oii its outer'end" lS'it closing cap 21-, and in cylindef'19 is] asecond pilot valve seat 22 "formedontl ie end ofa member 23 and spaced from valve-seat 20, Between the .two'valve seats and 22 is p, thus [provided a pilot .valvefchaniher 24 111 which. is located a pilot valve '25. The pilot valve chamber 21 is connected to the I STATES. PATNT 1 FFI E1.

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I h v I v Dec. 16, 191 9." Application m dito nbei as, 1e17 Serial .No. 203,501 i Surroiinding an opening through the'centrah portion of head 13 are two oppositely eX- interior of cylinder 16" bya passage '26, and

valve is against'seatQG, as shown in Fig. 1, the nterlor of cylinder 16 26, chamber 2 1, and

one .orn ore passages 27 which arelo'cated in cross pieces 28, to the:tl1roatof*tl1e Venturhshaped passage 12 3:; \Yheri the pilot valve 251s against seat22, communicatron between passages 26 and '2'? -.1s cutoff and the interior of cvlinder16 'isthen connected by passage 26, chaihherf24fand a passage'29 formed'in-airib 30 'onlhead 13,

to the 'flCllIllSSlOll side of the valve' casing. Connected to member23 1s a hollow operatingrod 31 which extends to the outside of casmg v it different from that prevented. a stem 38 which extends entire rod 31 to prevent leakage 'between" 5 throughapac-kingsleeve"32.; The

' member-23 and rod 31foijm sulostance'a single rod which is rigidlyconnected to the 4 main valve and slidesthrough thesleeVe 3-2 to more such valve. Sleeve is made comparatively long. extending; some distance both inside and outside the casingfd; 'It ma 'be'formed asv anintegral part of'tlie casing or,;.as a separate jpartfattached thereto by afiange 33,,as'shown. Therod' 31 is provided with packing'grooves 34: to prevent-=leakage and the packing sleeve-is made long. asshown, so a slto ofi'erthe greatest resistance-to; leakage. Art louter end the packing sleeve; 32'is counterbored to pr vide a seat 35;,and,the1outer .QDdhOfQlTOCl 31 has an enlarge'dihead fifi wh' hslides in the counte'rborcd end ofsleeve 82-, andisprovided witha seat 37 whichengagesfseat 35 f when the valve mechanism is fully-. open, as shown in Fig. 1. Under] these circumstances. it will 7 be seen, leakage between the packing sleeve 32 and rod 31 positively Connected to .pilot valve .25, is

rod 31 and provided pn its :end with-a head 39 having atheveled fac I adapted to engage a seat'gtl 1n.

through Wile-It ffaee toisten engagement with. I seat .41, the pilot valve 25 is'in engagement -"tl1is position and the main-L, s' either 5 fully open,'a's shown in Fig. "115 01? partially open, thepressure behind the main-valve'ln cylinder 16 is the pressure found at. the

throatofthe Ventur'i passage '12, such pres- 4 1 sure being conveyed to the cylinder throu h passages 27 and 26'. The pi'es'surespn t e I actuated means-,fonolosing the'yalye and does- .away with the use {o p gs 01 we1ghts',"orof'any outside sourceioflpressure two sides. of'the main valve are thus the I I same, andthe valve will besubstantially bal--'i anced, although there will be slight excess 'ofpressu're in a direction acting-tomQVe'the H I stem,38 may be connected with variousar '80:

valve" to closed position due to thei-rod 31' which passes out through the valve. casing-,..

" and is thus exposed at one .;end;t o gatmos phericpressure; As is well understood,'the-l Y extent of unbalancing of the valve would dothe difi'erence in pressure onthe twojends of the rod. The pressure at the throato'fthe, Venturi passage is lessthan the pressure'on vthe admission side of the valve cas ng due o the fact that a certain amount of pressure is converted into velocity when afluid flows through a Venturi 'assage. The drop 'i'n' pressure, as iswell own, depends on the amount which the-Venturi passage con an 3-1 ar held nfixed reneonto' aehbthef with the pilot valve 25 in the position shown.

in- Fig.1, then the main 'valve oanlhe opened or c1osed,or moved'toany intermediate pos1-= tion by moying the 'rod'31', the stem 38;.of

In this manner the main-valve can be-used a n' ordinar-y throttling -alvei and set. to any position. .If at any time: the pllot valve 25 is moved' relatiyeyto the main-valve so as.

to. bring it into engagement with valve: seat 22", then the passages '27- are shutoff and the; interior of fcylinder' .'16 is sub ected to "the pressureon the inlet side ofjthe valve casmgf 5 through passages- 29 and 26, which pressuyreiis higher'jthanthat, at the. throat of Yenturi -pasjsa'ge' ;12. I The mam valve w ll thus become 'unbalaneed sii1Ce the pressure; '.on the. 'l'ower-sid of the valve is that found iafi the-{throat of the .Ventur'i' p-assage F The I' yalt'eQwiH therefore move toward elosed;pqsition ,It will thusbe seenthat by. means'efgthe pilot valve the main valve may bei'auto matik'zally adjusted to. any'desi'red .m

catamaran position, the pilot valve ,being pend on the area of the end-of'rodfil and vergesi The pressur'eon the lowerside'of the pilotjvalve 25 is that found at the throat:- of the Venturi', and the pressurefon the: lower. yside'of the stem 38' is atmospheric pressure; since the stem passes out through casing 5* course, 7 moving simultaneously therewith..j

mannenif the pivot valve is movedagainst seat ZEZIandmaintained theregthe main valve -"w1l1.be automatically forced to closedposi-i'fm.

tion. -j It'l 'w'ill be seen that lobtain the balancing of themainvalve to close-"it y means of the use-of the Venturi passage-12 through which the fluid passing through the I valve'iflows, .This provides a sin pleffluid 7B and pilot valve aecording'to l l pa1ti6 1le 7 appl c mn to whieh'the valve structureis to be put. When the-'. valve istruoture a ta -"3 8' scribedis'to be used as a eombined. trip and:

throttle velve I- preferably u'se'anovelIorm of controlling meohanism, as follows: v ,The;outerendjof rod3l is squared, and

-projacting from thej-squaredend is a. seg- 9'0" :ment 42hav1ngteeth i ialong'its edge; I Pro-.

vjeoting from 3 two "i opposite I sides-10f .th

squared end of rod-glare two studs 44 upon =wh1oh'1s p1votedap1lot valve actuator com- "prising-two lplatesyl'a' The plates; areh'eld :m place o'n-t I est'uds by suitable nuts 46 and" Y between the studs andthe plates are e'ceen trio sleeves 4:7 having fingers 48 by means'of WhlCh they beturned to adjust 'the pilot "val-. v e actuator, as is referred to hereinafter;- The'ou'ter ends of plates 45- are lpivoted in spaced relation to'ea'eh other-on the end of w an arm 49-having {L'IIOSB 50 extendingat an oanglethereto and.oonnected -to segmentfi45. v by a l 1 'nk5 1'.' f Nose50 and link 51-thusformI1l15 avto'ggle,'- The plates 45 are provided with shortcurved s1ots52 into which project studs :53 icarried by-the hea'd 39 .on tl ie end of stem. 38. When thefarm 49 is swung toward-the leftthe toggle comprising nose 50 and link 11''!) 51. will be broken and the plates 45 will be swung toward the left. This forces the oiui'ved slots 52 along studs 53 and moves the pilot valvenand its stem :to a positionwhelte ,the pilot valve engages seat 22. .This posi- 1115 p-tion ofthe'plates et5andarm 4:9fis shown ..1n'F1g. 3. Tllfl'PliLtGSAfifftlG also spaced apart- 'byacollar; through which :extends I a pivot-pin 55', theendsoflwhich -project beyond the plates; 'Pivoted on the ends of pm ;--55.at its-elbow is a bell crank hand leX 'er56,

oneendof which is the form 'of. a handle 57. The other end 'oflever' 56 is pivotally connected to the stationary 'sleeve"32 by v a link 58, thus forming a toggle which may be straightened out, as showni'n Fig; 3,,to'close-f the-mainyalve, The one endiof-hand lever; {I "56 is forked to straddle the segment 42, {and the two-members of the fork-are held-on t e ends {of pins 55 by suitable nuts 59. Pin 13-0; Q

, otedwithinthe hand lever 56, directlyiover the teeth on segment 42 is a catch 60 having one or more teeth which engage the teeth 43.

a The catch 60is provided with short journals which project through openings in the lever 56 and are rigidly connected at their ends by a u-shaped member 61 which is connected by a rod" 62 to ausualform of catch lever-63.

' swung towardv the left to move pilot valve .pivot by grasping the When the. catch lever. 63 1s movedon' its handle 57 the rod 62 pulls on the U-shaped member 61 and turns the catch 60 on its journals through an angle pilot valve is the seat .40 on head 39 is held vagainst seat 41. The studs 53 are at one end of slots 52.

The efiective length of the plates 45 may be I varied by turning the eccentric sleeves 47 so the valve is closed,

as to obtain correct seating of the pilot valve 25' and valve seat 40. The pilot valve 25 and its stem are thus positivelylocked to rod 31 to move therewith. The main valve may now be opened or closedor moved to any intermediate position by means of hand lever 56, such lever. acting to move the rod 31- through the toggle formed by the bent'end of lever 56 and-link 58, and it may be fas-v tened'in such position by catch60 engaging segment 42. As already explained, when the pilot .valve 25 is in this position the main valve is substantially balanced. Whenthe main valve is partially or pressure on its opposite sides is that at the throat of Venturi passage 12; whenclosed it is that on the discharge side of the valve casing The main valve is always biased toward closed position,'or when closed held in such pos'itionby the pressure on the upper side of pilot [valve '25 and stem 38. It, When it. is desired to have a greater f 'rce holding it closed, the arm 49 mav against seat 22which will close 0E passages 2" and admit thepressure on theadmission side or valve casing 5 to cylinder 16. Now to again open the main valve. the pilot valve 25 would be moved back to its former position against seat 20 thus relieving the pressure in cylinder1 6 after which the-main along a Itatga'ny time when the valve is opened by lever56; an' open.=p'osition itc is' desired to quickly closev the same,

the leftiv hi g plates .45 and forcing slots valve 25;.to a position where it engages seat -pilot valve 25 into engagement valve the arm 49 v1 course,

opened, as already explained;

The-arm 49 may be operated manually,

wholly open the be moved tO S lllft the pilot valve over trolling said 'c'onduits.fa 3.? main valve- 1s 1n the arni49 is swung toward ads-T53, thus moving the pilot 22, and at. lever 56 bodily toward the left to disengage catch 60 from teeth 43. This latter results from the fact that.

hand lever- '56 is ful- ;.The movement of the I with slots 22 'admitsfthe' pressure existing lon' the ads. mission side of casing 5 to cylinder 16, which pressure the throat of quickly forces the main valve to closed posicrumedon plates 45.

tion. 'The'positionswhich the valve 'operating parts assume under these conditions is-shown in Fig. 3. To again open the'mam pilot valve back: against seat '29 thus reliev-' ing the swings plates 45t'owa-rd the left and brings catch 60'back into engagement with teeth 43. The main valve may then be but when the valve mechanism-is used n connection with a prime mover, fol-example,

an elastic fluid turbine, for controlling the flow. of motive fluid thereto, the arm 49 will be connected with the emergency governor ofthe prime mover so that in case of excessspeed the arm 49 will be moved to cause the main valve to .autom aticallI'y. close, thus shut ting down the machine. cates arod which may-lead to such-an emer; gency mechanism and be moved by it in't 1e valve mechanism.

In'accordance withthe provisions'of thepatent statutes, I have described the principle of operation of with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is ma illustrative,. and that the invention can other means. v

' \Vl1at I claim as new and desire 'to secure by Letters Patent of the United States, is

1. In a valve mechanism, the combination of a casing having a seattherein, a main valve adapted to engage theseat, a wall so arranged that when the main valve is open the same time swinging hand" beinggreater than thatfat' the Venturi "passage 12 first moved to bring the pressure in cylinder 16. This, of-

ordinary and well-known manner to tript e my invention, together a n Fig. 1, 66'indi-- be carried out .by

thereis formed avei turi shaped passage I through which the fluid flows in passing through the main valve, a cylinder, a PIS:

ton connected to the main valve and located in said. cylinder, conduits which connect the cylinder to the throat of the Venturi shaped passage and to the admission side} of the valve casing, and a pilot valve means coir the lcoinbination of ,acasing having a seat therein, a main valve adapted to engage zthe-a-s'eat, a wall so arranged that when the maili'iva'lve is-open there is,

2-. In a'valve mechanism,

formed 'a Venturi: shaped-passage. through which the fluid flows 1n pass ngvalve.casing,.a pilot valve controlling said conduits, arod for moving the main valve,

a; stem for the pilot -.val.ve ,-said stem. and

pilot: valve being. movable independently of 1'0 thenia n valve' and its rod, and means for locking said 'stenrand rod'together.

tlniough vvhich tlie fluid flowingthrough the valve'passes, vpiston and cylinderassociated with "the valve for .nioving-it, a pilot valvc,and conduits controlledhy the pilot gevalve for, connectnig the cylinder to either the throat of the venturi section or to a region. ofdifierent pressure. v

In a; valve'inechanism, the combination ofaca'singa valve therein, the contour. of said valve and easing being ;such"as to form .a Ventnrtshaped passagev'hefi the valve is 'op'en', a cylinder inwhich the valve slides,

conduit connecting: the cylinder to the adm ssion-side of the caslng, a' conduit conae nectingithekcylinder to the throat of the venue-shaped passage, and a pilot =valve controlling said conduits. I

5. In a valve -1ne'ch anis m, the combination of a casing provided with a central .Well

v 1 5: havingan opening thereima cylinder in the opening having a seat thereon, a main valve adapted to engage-the seat, said main valve having, a. curved Wall which forms with snag: cylinder Venturi-shaped passageat" iv'lienthe valvexisopen, a cylinder in which the 'head'o' f theivalve slides, conduits in the main valve Whl(1l1", connect the cylinder to the admission side of the valve casing and to the throat of said; 'Venturi-pa'ssage, and a. 45, pilotvalve controllingsai d" conduits.

.dQIn-afvalve mechanism, the combina--. tion of a -,cas1n a mam-valve therein, arod,

for moving, it," a pilot i-valve associated with the 'main-valve, .aste1n for thepilot valve, 11163118.fOFfiLStQlllng the pilot valve and its stern ini fi'xed relation to vtheniain valve and its, red, means fr adjusting the main valve to any' desired position, locking-means for" said adjusting means, and means c0nnecting said pilotjv'alve fastening means to said main valve locking means whereby vvhenthe pilot valve fastening means 'is-released said valvelocking' means will alsohere:

leased .and the main vale automatically '60 j'closed, Y Y

'7. In a valve mechanism,"'thecombine-1 tion of a casing, a main valve thereimn.

rodfor moving it, a pilot -valveassociated witht h e main. valve, a sten1 fpr the pilot B5 valve meaps for fastenmglhep lot valve" Leashes and its-stem in fixed. relation to the valve and its rod, means' for adjusting the main valve to any desired position, locking- H M position, a segment over'which -the lever Y 3-..- ln a valv'e'mechani'sin, the, combination of acasing .having-aseat thereim'a valve a adaptedto'engage'tlie seat,.sa-id valve when if; openfdefining a" venturi-shaped passage moves, a catch forlo'cki'ng the lever to the segment, and means for slmultaneously moving saidpilot valve and releasingsald catch to close automatically the main valve;

' 9. In a valveimechan'ismi, the combinationof a valve casing, 21 main valve and'a pilot valve-therein, an operating rod'connected to the main. valve, a stem for the pilot valve, a pilot valve actuator pivoted on said'rodfli and connected to the stem, and a lever for operating the "main valve which is relc'rumed on the pilot valve actuator and is connected by a link to'a stationary portion Lof'the valvejcasing thereby forming a toggle 9'0 through which the main valve" is moved.

10. In a valve mecl12inisn1,'tl1e combinationoi a valve casing, a main valve and a pilot valve therein, an operating-rod con nected-to the main valve, a stem for the pilot valve, a pilot valve actuator pivoted 'lever which engages thescgment', 'whereby' when said pilot va ve'actuator is.'moved to move the pilot valve so as to cause the main 10"5 valve. to close said catch is moved fromengageiiientavifli the segment.- 11-..-In a valve mechanism, the combination of a casing, alvalve thereiman operating rod for the valve,-a pi"oted lever for mov- 'ing the operating rod, 21' toothed segment,

a catch pivoted to the lever'in the plane of I 'said segment for/engaging the segment, means for niovingthe catch .on its pivots J g to disengage it from the segment, and means for moving the lever. in the-plane of the segment to disengage" said catch.

.12. Ina valve mechanism, the con bination of a valve casing, a main valve-and a -'pilot'valve therein, an operating rod con-.-12'0- nected .to the main valve, a' stern for. the pilot valve, a pilot/valve actuator .plvoted.

on said grodfand connected to the stem, and

a, lever for operating the main valve which 1' :'is' fulcrumedon'the pilot valve actuator-and 125. is connected by a-' link to a stationarypor 'tion of thevalvejcasing, a seginenton said rod over which .the, lever moves, a vcatch pivoted an the-lever in the plane of'the" i 'tsegment, andllneans' ifor, niovinz-l-the catch on' 1E8" pivots-to disenga e it .from the seg- .ment, said catch. being aso moved fro'mengage'ment withthe segment when said pilot valveactuator is moved to move the pilot:

val-veso as to cause'the'inain valvelto close.

' In favalve mechanism, thecombination of. a casinga; valve and-a pilot valve therem, conc entr1c members one of which is connected'to' the main valve andfth'e other 16 i "'nected 'to one of said members, said actuator to'thepilot valve, an actuator normally con;

being providedwith an angular slot, aypin on the -othe r .member l.which engages said slot, and an arm for moving said actuator to move the pilot valve relatively to the maintherein, concentricmembers'one of which is 7 to the pilot valve, anactuatorpivotedto one of said members, said actuator being prothe '14. In a valve mechanism, the combinationof a casing, a main valve and a pilot valve connected to the main valve'andthe other vided with an angular slota pin on the other member which engages said slot, and

I an arm for oscillating saidactuator to move pilot valveand main valve relatively to each; other-..

, 15. In avalve mechanism, the combination of a casing, a' main valve and apilot valve isT-moved to move the therein, concentricmembers one oi which is connected tothe main valve. and jthe,oth er to the pilot valve, an actuator normally connected to-one' of said members, said actuatorbeing providedwith an angular slot, a pin on the other member which engages s'aid-slot, an armr'for moving'said actuator to move the pilot valve relatively to the main valve,

"means forlocking said' main valve in open. -position, 4'0

and means whereby when said arm 3 t'uates said locking means.

. valve, 5

16, In a valve mechanism, the combination of a casing, a main valve therein, a pilot means controlled by the pilot valve for automatically effecting the closi g, of the main valve, means for locking he main valve open, and means for moving'said pilot valve and releasing said locking -means .whereby the mainvalve may be automaticall closed. v I

1;. In a valve mechanism, the combination of 'a casing, a main valve'therein, a pilot valve, means controlled by the pilot valve -for efi'ecting the closing 01 the mam valve,

pilot valve it also acconcentric members'oneof which is connect-- edto the main'valve and .the otherto the pilot valve, means for opening and closing the main valve, lOCklIlg means for said-last nam'ed means, an actuator for. moving the pilot valve' relative tothe main valve, and

- means connecting-said actuator to the looking means whereby when said-actuator is moved to effect the closing of the mainvalve,

it also unlocks said locking'means.

' 18. In a valve mechanislm'the. combination of -a casing, a seat therein, a valve adapted to engage the seat, said valve when open defining a Venturi shaped passage'through which thefiuid flowing through the valve passes, a piston and cylinder associated with the valve. for moving it, apilot valve, conduits controlled by the pilotvalve for'connecting the cylinder to either the throat of.

ev turisection orto a region of difi'erent' pressure, concentric members one of 'whichis connected to the main valve and the other to the pilot valve, an actuator normally'c'onnected to one of said members, said actuator being :provided with an angular slot, a pin on the other member which en gages said slot, and .an arm for moving said actuator to move the pilot valve relatively to the main valve.

of a casing, a seat therein, the valve adapted v 19. In a valve mechanism, the combination to engage the seat, said'valve when open definin actuator being provided with. an angular slot, a pin on the othermember which engages said slot, an arm for moving said actuator to move the pilot valve relatively to the main valve, means for locking said main' valve in open position, and means whereby when said arm 1s moved to move the pilot valve it also actuates said locking means.

In witness whereof I have hereunto set my hand this 21st day ofNovember, 1917.

JAMES WVILKINSON.

a Venturi shaped passage through. which the fluidflowing through the valve

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